地埋管内水流速对地源热泵系统热响应测试的影响

摘要

阐述了如何利用变频技术改变地埋管内循环水流速,根据PLC模拟量模块采集到的地埋管进出水口温度数据,计算得到在不同循环水流速下的土壤导热系数,利用实验数据分析地埋管内水流速对土壤导热系数测定产生的影响,为工程上准确测定地源热泵系统土壤导热系数提供地埋管中水流速的参考依据.%Changing water flow in buried pipes with frequency conversion technology was described; basing on the temperature collected with PLC at water inlet and outlet,the heat conductivity coefficient with different water flow was calculated, and the water flow impact on measuring heat conductivity coefficient was analyzed to benefit upcoming engineering application.